<!--
  ~ Copyright (C) 2010 Brockmann Consult GmbH (info@brockmann-consult.de)
  ~
  ~ This program is free software; you can redistribute it and/or modify it
  ~ under the terms of the GNU General Public License as published by the Free
  ~ Software Foundation; either version 3 of the License, or (at your option)
  ~ any later version.
  ~ This program is distributed in the hope that it will be useful, but WITHOUT
  ~ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  ~ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  ~ more details.
  ~
  ~ You should have received a copy of the GNU General Public License along
  ~ with this program; if not, see http://www.gnu.org/licenses/
  -->

<html>
<head>
    <title>Sentinel Toolbox Help - No-Data Value</title>
    <link rel="stylesheet" href="../style.css">
</head>

<body>
<table class="header">
    <tr class="header">
        <td class="header">&nbsp;
            No-Data Value</td>
        
    <td class="header" align="right"><a href="../general/overview/SnapOverview.html"><img src="../images/snap_header.jpg" border=0></a></td>
    </tr>
</table>

<h3>No-Data Value</h3>

<p>Band or tie point grids of a data product determine by two means whether or not a pixel at a certain position
    contains data:
    <ul>
        <li>a no-data value and/or</li>
        <li>a valid pixel expression is set.</li>
    </ul>
    These properties can be adjusted using the <a href="PropertyEditor.html">Property Editor</a>. If valid pixel
    detection is
    enabled, invalid pixels are excluded from range, histogram and other statistical computations.
    In order to visualise the invalid pixel positions, the <a href="NoDataOverlay.html">No-Data Overlay</a> is used.
</p>

<p>The no-data property of a band is also set by the <a href="BandMaths.html">Band Maths</a>
    and <a href="Reprojection.html">Reprojection</a> tools.
</p>

<br>
<hr>
</body>
</html>

<!--page visited by UK-->
